Katrina – and the radio waves.

On a thoroughly dark day for journalism – in which two US journalists were apparently shot dead by one of their own disgruntled colleagues, it’s easy to see why our profession has something of “a reputation” – and all too often, the wrong reputation.

However, it’s worth reminding ourselves – and the rest of society – why we do this. And I cannot begin to explain it any better than BBC correspondent Rajini Vaydianathan.